Fixed broken compilation when caches are disabled
Merge pull request #61 from adrianlshaw/broken-cache-fix

Fixed compilation errors when caches are disabled
Events: Improve compatibility for building events code across Xen versions.
Merge pull request #62 from Zentific/msr_events_compat

Events: Improve compatibility for building events code across Xen versions
New feature providing single step functionality to the events subsystem. Includes top-level API, specific implementation for the Xen driver, and example code.